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| author | Andres Freund <andres@anarazel.de> | 2017-10-09 15:20:42 -0700 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2017-10-09 15:20:42 -0700 |
| commit | 8a241792f968ed5be6cf4d41e32c0d264f6c0c65 (patch) | |
| tree | 80391a1d37c432548e50d07a58a484278c202f74 /src/include/common/string.h | |
| parent | 71c75ddfbb277362bf62dc5b1645c3903e16bc34 (diff) | |
| download | postgresql-8a241792f968ed5be6cf4d41e32c0d264f6c0c65.tar.gz postgresql-8a241792f968ed5be6cf4d41e32c0d264f6c0c65.zip | |
Add pg_strnlen() a portable implementation of strlen.
As the OS version is likely going to be more optimized, fall back to
it if available, as detected by configure.
Diffstat (limited to 'src/include/common/string.h')
| -rw-r--r-- | src/include/common/string.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/include/common/string.h b/src/include/common/string.h index 5f3ea71d613..3d46b80918c 100644 --- a/src/include/common/string.h +++ b/src/include/common/string.h @@ -12,4 +12,19 @@ extern bool pg_str_endswith(const char *str, const char *end); +/* + * Portable version of posix' strnlen. + * + * Returns the number of characters before a null-byte in the string pointed + * to by str, unless there's no null-byte before maxlen. In the latter case + * maxlen is returned. + * + * Use the system strnlen if provided, it's likely to be faster. + */ +#ifdef HAVE_STRNLEN +#define pg_strnlen(str, maxlen) strnlen(str, maxlen) +#else +extern size_t pg_strnlen(const char *str, size_t maxlen); +#endif + #endif /* COMMON_STRING_H */ |